ear ossicles.pptx

ear ossicles

1. The Auditory Ossicles The Malleus : Its superior part, the head , lies in the epitympanic recess . The head articulates with the incus . The neck , lies against the flaccid part of the tympanic membrane . The short process is connected by a ligament to the the tympanic cavity. The Stapes: The base (footplate) of the stapes (L. a stirrup), the smallest

2. The chorda tympani nerve crosses the medial surface of the neck of the malleus. The handle of the malleus (L. hammer) is embedded in the tympanic membrane and moves with it. The tendon of the tensor tympani muscle inserts into the handle . The Incus : Its large body lies in the epitympanic recess where it articulates with the head of the malleus . The long process of the incus (L. an anvil) articulates with the stapes .

3. Stapes The stapes or stirrup is a bone in the middle ear of humans and other animals which is involved in the conduction of sound vibrations to the inner ear. This bone is connected to the oval window by its annular ligament, which allows the footplate to transmit sound energy through the oval window into the inner ear. The stapes is the smallest and lightest bone in the human body, and is so-called because of its resemblance to a stirrup

4. BONE JOINT TYPE B/W Incus & Mallus incudomalleolar saddle B/W Incus & stepies incudostapedial ball and socket ARTECULATION The articulations are typical synovial joints